Brake mechanism.



No. 664,895. Patented Jan. 1, ism. H. E. PUTNEY.

BRAKE MECHANISM.

(Application filed Mar. 30, 1900.)

(No Model.)

i i/i 51- TH: 3am: PETERS co, PnOTO-L|THO.,WASNINGYON ac llNlTED STATESPATENT OFFICE.

dilERBERT E. PUTNEY, OF TOLEDO, OHIO, ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS, OF THREEFIFTHS TO MILTON D. PUTNEY, HENRY W'ILE, AND JESSIEL. WBITNER, OF SAME PLACE.

BRAKE MECHANISM.

SPECIFICATION forming part of Letters Patent No. 664,895, dated January1, 1901..

Application filed March 30, 1900. Serial No. 10,738. (No model.)

To aZZ whom it may concern: frictional engagement with disks 3 of wheels50 Be it known that I, HERBERT E. PUTNEY, a 2 and provided with acentral orifice 8 of a citizenof theUnited States,residingatToledo,diameter greater than the diameter of the in the county of Lucas andState of Ohio, have hub 4 andadapted to receive the hub cen-' 5 inventeda new and useful Improvement in trally without contact therewith. Shoes6are Brake Mechanism, of which the following is formed of sections 9 and10, each incut to 5 5 a specification. form one-half of orifice 8 andhaving com- In the specification of Letters Patent No. plementaryoverlapping portions 11 and 12, 581,490, dated April 27, 1897, I havedescribed respectively, which are provided with coinan improved brakemechanism applicable to cident orifices, through which are inserted carswherein brake-shoes are simultaneously bolts 13, by which the sectionsare firmly 6o moved into and out of frictional contact with securedtogether around an axle l, with the disks secured to the car-axles bymechanism heads of bolts 13 countersunkin the frictional simultaneouslyactuating the shoes. Withface 7 of the shoe. The sections are also 15out departing from the principle of the brake provided with ribs 14 onthe opposite side mechanism therein described my invention to increasethe rigidity of the shoe and with relates to improvements thereof, andhas for oppositely-projecting shanks 15, one or both its objects tosimplify the construction and of which are adapted to be bolted to asupapplication of the brake mechanism, increase porting-bar 5 andprovided with a boss 16,

20 its effectiveness, and establish it in better according as the shoesare designed to be relation to other parts of the car mechanism,attached to the bars in pairs, as shown in with reference toaccessibility to both car and Figs. 1 and 2, or singly, as in Figs. 5and 6. brake mechanism; furthermore, to provide Centrally through thebosses l6 and the noiseless friction-surfaces for the brake readshanks15 are orifices 17, which are inwardly 25 ily renewable when worn. itaccomplish these threaded with right or left threads of equal objects asillustrated in the accompanying pitch, according to the position of theshoe, drawings and hereinafter described. all of those on the same sideof the car being In the drawings, Figure 1 is a diagramrelatively rightor left threaded in respect matic plan view of my invention applied to aI to those in the shoes of the opposite side.

0 car-truck. Fig. 2 is a longitudinal section Between the shoes 6 ofeach axle and conthrough a car-truck, showing a brake bar necting themare shafts 18, in threaded enand shoe in side elevation. Fig. 3 is atransgagement therewith through the orifices l7. verse section of acar-wheel and of a brake- One end of shafts 18 is right and the othershoe as applied thereto. Fig. 4 shows one left threaded to adapt them tosuch engage- 5 section of a shoe. Fig. 5 is a longitudinal ment. Shafts18 are provided with suitable section through a car-truck, showing aside pulleys 19, by which all the shafts 18 of each elevation of a shoeand brake-bars as applied car are revolubly connected to each other andto a single axle thereof; and Fig. 6 shows a to the brake-operatingmechanism, prefermodified form of brake-shoe. ably by wire-rope belting20, rived around 40 Referring to the drawings, 1 l are the axles thepulleys; but crank-levers may be substiof a car-truck, having wheels 2permanently tuted for the pulleys and connecting-rods for 0 securedthereon, each provided with a conthe belting when better serving thepurpose centric disk 3 on its inner face and preferofrotating the shafts18 in unison. The shafts ably cast integral therewith and anelongated 18are made of such length that when in 45 inwardly-extended hub 4:.threaded engagement at each end with a 5 5 are supporting-bars, restingin position brake-shoe the frictional faces of the shoes of 5 near andparallel to the wheels, across beams each axle may be held at suchdistance from of the truck-frame, to which are secured the face of theirrespective Wheel-disks that brake-shoes 6, having one face 7 adapted toone revolution, more or less, of shafts 18 will simultaneously advancethem into or retract them from direct contact with the disks of thewheels, according to the direction in which the shafts are rotated, andthe several shafts of a car being rotated in unison all the shoes of acar will be advanced or retracted in unison. Shoes 6 thus connected aresupported by bars 5, secured thereto as described, resting across thecentral beams 21 of a car-truck when applied to all of the wheels of astreetcar truck, as in Fig. 1, or on a central and end beam of the truckwhere applied to the wheels of a single axle, as in Fig. 5, or on thesand-plate or its equivalent of the trucks of railroad-cars, the bars 5being constructed in such form as may be best adapted for their ownsupport and the support of the shoes in proper position for contact withthe wheeldisks. Bars 5 are also provided with any suitable means ofpreventing their longitudinal or vertical movement without limitation oftheir lateral movement by shafts 18, such as stops 22, (shown in Figs. 1and 2,) and to prevent the lateral shifting on the truck of the frame,formed of shoes 6, their connectingshafts 18, and supporting-bars 5,spring-stops 23 of suflicient resistance attached to the supports of thebars, either between or outside the bars, adapted to yield to theretraction or advancement of the bars under the pressure of screw-shafts18 may be used.

The friction-disks 3 of the car-Wheels are preferably provided withfriction-plates 24, of ind urated fiber or other suitable material,secured thereto by bolts 25 through the web of the wheel, with the headsof the bolts countersunk in the friction-plates. Similar plates may alsobe attached to the bearing-face of the shoes 6 in a similar manner. Bythe use of the plates 24:, which may be renewed as required, the wearingof the Wheel-disk or of the metal of both the Wheel and the shoes isavoided and the noise arising from frictional contact of metal withmetal is prevented.

The elongated hub 40f wheel 2 is designed as a substitute for thecollars ordinarily used in electric-railway car-trucks to confine themotor and prevent it from shifting its position on the axle. While itsuse for such purpose is preferable, it may be omitted from wheels wheremotors are not attached to the trucks.

In Fig. 6 is shown a modified form of brakeshoe 6, longitudinallydivided into sections 26 and 27, adapted to be bolted together aroundthe axle. In this form while more effective with the sections combinedit is 0perative with the section 27 omitted, the bosses 16 and shanks 15for securing it to supporting-bars 5 being both integral with section26.

By providing the wheels with friction-disks the necessity forindependent disks on the axles is avoided, thereby reducing the numberof separate parts required, economizing space, increasing theeffectiveness of the brake, and rendering both brake and car Having thusfully described my invention,

what I claim to be new, and desire to secure by Letters Patent, is

1. The combination of aframe, an axle journaled in the frame, a pair oftrackwheels fixed on the axle, each having a friction-disk integral withits inner web, concentric to the axle, friction-plates removably securedto the friction-disk of each wheel, a brake-shoe for each wheel, adaptedfor engagement with the plates of its disk and movably supported by barssecured to the shoes and resting on the frame, and means tosimultaneously advance the shoes to engagement with the plates of thedisks, and adapted to retract them again from suchengagement,substantially as shown and described.

2. The combination of a car-truck frame, an axle j ournaled in theframe, a pair of trackwheels fixed on the axle, a friction-disk integralwith the inner web of each Wheel concentric to the axle, a brake-shoefor each wheeLmovably supported by bars secured to the shoes and restingon the frame and adapted for engagement with the disk of the wheel,shafts connecting the shoes by right and left threaded engagementrespectively therewith, adapted, when rotated in one direction, toadvance the shoes to simultaneous engagement with the disks of thewheels, and, when rotated in the opposite direction, to retract themfrom such engagement, and means to rotate the shafts simultaneouslyforward or I to connecting the shoes on the same side of the frame inparallel and opposite relation to their respective disks and to theshoes and disks of the other side, movably supported by the frame,shafts connecting the shoes of one side with shoes of the other byrelatively right and left threaded engagement therewith, adapted, whensimultaneously rotated in one direction,to simultaneously advance theshoes of both sides of the truck outwardly to engagement with theirrespective wheel-disks, and, when rotated in the opposite direction, toretract-them from such engagement, and means to simultaneously rotatethe shafts forward or backward.

4. The brake mechanism herein described, comprising car traction-wheelsmounted on axles journaled in a frame, disks integral with the innerwebs of the wheels concentric to their axles, friction-plates removablysecured to the disks, bars, movable laterally, supported operatingsubstantially as vshown and de- I0 by the frame on opposite sidesthereof in parscribed.

allel relation, brake-shoes secured to the bars In witness whereof Ihave hereunto set my and supported thereby in position to contact handthis 22d day of March, A. D. 1900,

5 with the plates of the disks, and means con- 1 nected to the shoesadapted to simultaneously HERBERrl PUTNEY advance each shoe intofrictional contact with Witnesses: the plate of a wheel-disk, and againretract F. S. lVIACOMBER, them from such contact, all constructed andHERMAN H. MARTIN;

